Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
48,164 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Mercury Mountaineer drivetrain problems

drivetrain problem

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2004 Mercury Mountaineer Owner Comments

problem #1

Mar 142006

Mountaineer 8-cyl

  • Automatic transmission
  • 48,164 miles


Rear axle failure at 11,000 (side bearings) and 48,000 miles(bearings and rear axle). Due to design mistakes, and probably cost reduction programs, mud can trap open a breather valve for the rear axle. Then water goes through the valve and into the axle, and destroys the side bearings, and clutch flange, and pinion. The replacement cost of these items is nearly$1,300.

- Milford, MI, USA

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